Sizing.



mm s'r 'rEs mm orricn.

cLAnK H. BENNETT, or cnicnco, iLmNors', AssIGNon T0 CORNELL woonrnomrcrs COMPANY, or COR ELL, WISCONSIN, A CORPORATION or wIscoNsIN.

SIZING.

,2 Specification of Letters Patent. No lDrawing.

Be it known that I, CLARK I-I. RnNNE'r'r, a citizen of the United. States, residing at Chicago, county of Cook, State of Illinois,

have invented a certain new and useful Improvement in Sizing,-and declare the following to be a full, clear, and exact description of the same, such as will enable othersskilledin the art to which it pertains'to make and use the same.

My invention has for its object to producea novel sizing for wall board or other devices made of pulp or fiber which will give a sur- I face that is'more impervious to moisture, that will better stop suction when paint is applied to the surface, and will be better adapted as a drying surface fora coat of paint than it has heretofore been possible to obtain with such sizings as 'have come to my attention.

One of the common sizings consists of 'resin and wax such as paraflin or its equivalent, but such a sizing is far from satisfactory. I have found that by combining with wax-and resin an oil or oils, much more satisfactory results are obtained. I have also found that the'addition of a neutralizing agent, decreasing .the acidity and raising the melting point of the resin, adds to the value of the sizing. As the neutralizing agent there may be employed caustic soda, or sal soda, bicarbonate of soda, soda ash, quick lime, air slaked lime, magnesium oxid, etc.

Furthermorefloy the addition of manganese dioxid and lead oxid, drying properties are given to the sizing which insure that there will be no defect in the sized surface by rea- I son of improper drying. A solvent such as turpentine, benzin, kerosene, benzole, solvent.

naphtha, etc., may be used if desired and, where used, it will be in amounts varying with the temperature at which the sizing is to be applied; the'greater the amount of the solvent, the lower. the temperature at which the sizing may be applied. f

Instead of wax, fats or fatty acids may be employed,'or there may be a combination of fats, fattyacids and wax, or any of them. Thus, in addition to parafiin wax, beef or mutton tallow, horse fat, lard, wool fat, stearic acid, bees wax, carnauba wax, ceresin wax, Japan wax, parafiin shale, Vaseline, parolite, alumina stearate, alumina palminate, asphaltumand gilsonite are available.

Oils that may be used to advantage are Patented Apr. 8, 1919.

Application filed March 15, 1917. Serial No. 155,050.

corn oil, cotton seed oil, linseed oil, palm oil,

rape oil, soy bean oil, tung (China wood) oil, paraiiin oil, neutral oil and the petroleum oils. The following formulas represent preferred examples of my invention or discovery:

Resin 60.0 Calcium hydroxid 2. 0 Paraflin wax; n 12. 5

Paraffin oil 22. 1 Manganese dipxid 1.4 Lead oxid 2'. 0

v 100. 0 j II. Resin 60.0 Lime or calciumhydroxid 1 2. O "Paraffin oil 1010 vParaffin wa'x 12. 5 Tung (China wood) oil 12. 1 Manganese dioxid '1. a Lead oxid 2. O

100. 0 p III. Resin 60.0 Calcium hydroxid 2. 5 Stearic acid 10.0 Tallow 2. 5 Par'afiin oil 10. O \Vood oil 11. 6 Mang. dioxid 1. 4 Lead oxid 2. 0

s IV. Resin 60. O Stearic acid 10. 0 Calcium'hydroxid 2. 5 Tallow i 2.5 Wood oil 21. 6 Mang. dioxid 1. 4 Lead oxid -4 2. 0

In making the sizing it is preferable that the method commonly used in the manufacture ofvarnish be emp-loyed,that is the constituents being given a, heat treatment or being added at, the endbfthe cook. In the case of solvents, the additiohiswmade after the fats or waxes, while any of theoils before mentioned may be cooked with the resin.

I claim:

1. An-insoluble sizing consisting of an oil or oils combined with Wax, a resin, a neutralizing agent for decreasing the acidity of the resin, and one or more dryin agents.

2. An insoluble sizing made ot the following ingredients combinedv by cooking: A resin sixty parts, wax twelve parts, oil twenty-two parts, drying oxids three parts, and a neutralizing agent for decreasing the acidity of the resin two parts.

tion.

sizing made up of wax,

ents.

A sizing comprising an oil or oils comblned with Wazgya resin, calclum hydroxld,

manganese diOXid and lead oxid.

In testimony whereof, I sign this specifica- CLARK BENNETT.

manganese dioxid, lead 

